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Global statistics

These statistics are computed automatically from users’ data, which can be inaccurate or incomplete (especially legacy data migrated from the previous LORD version). Therefore, they must be interpreted carefully. For more details, please read the guide.

Demography

Total number of rats 49,070 rats
 ⨽ females  ⨽ 25,182 females (51.32 %)
 ⨽ males  ⨽ 23,888 males (48.68 %)
Rats considered as deceased 45,852 rats (93.4 % of all rats)
 ⨽ declared with known date  ⨽ 21,704 rats (47.3 % of deceased rats)
 ⨽ presumably dead  ⨽ 24,148 rats (52.7 % of deceased rats)
Lifespan
 ⨽ average  ⨽ 22.2 months (♀: 22.6 months – ♂: 21.8 months)
 ⨽ average, infant mortality excluded  ⨽ 22.7 months (♀: 23.1 months – ♂: 22.3 months)
 ⨽ average, accidents also excluded  ⨽ 23.5 months (♀: 23.8 months – ♂: 23.1 months)
 ⨽ maximum  ⨽ 4 years, 3 months, 28 days (DS. Cerberus)

Breeding

Total number of ratteries 686 ratteries
 ⨽ active in the last 2 years  ⨽ 34 ratteries (4.96 %)
Average rattery lifetime 904 days (2.5 years)
Average rattery productivity 8.4 litters (44.6 rats)
 ⨽ as birth place  ⨽ 6.7 internal litters
 ⨽ as other contributor  ⨽ 1.7 external litters
Average mother age 233 days (7.6 months)
Average father age 439 days (14.4 months)
Average litter size 6.6 pups (debiased estimation: 10.3 pups)
Average sex ratio 0.988 (about 101 females for 100 males)

Mortality

Median death age 23 months (50 % of rats die before this age, 50 % after)
Death peak 24 months (death occurs more often at this age than any other)
Interquartile interval 16-27 months (50 % of rats die in this age interval)
Leading death category “Other” (25 % of declared deaths)
Leading death cause “*Old age, natural death (from 24 month old minimum)” (23 % of declared deaths)

Death categories

Number of recorded deaths 21,704 rats (47 % of rats considered as dead)
By decreasing frequency * please note that tumours without recorded localization appear as « Autres »
25.01 %
Other
22.8 %
Old age, natural death (from 24 month old minimum)
16.91 %
Unknown cause
12.39 %
Respiratory
7.91 %
Accidents, traumas, poisonings
7.07 %
Neurological (brain, spinal cords, nerves)
2.16 %
Infant mortality (up to 6 week old)
1.35 %
Eye, ear, mouth, face
1.33 %
Reproductive system
1.16 %
Cardiovascular
0.93 %
Digestive
0.72 %
Urinary system (kidney, bladder)
0.25 %
Skin
0.05 %
Muscles and skeleton

Most frequent death causes

Number of deaths with recorded cause 21,704 rats (47 % of rats considered as dead)
By decreasing frequency * for rats recorded as dead without precise cause, death category is used instead
22.8 %
*Old age, natural death (from 24 month old minimum)
16.87 %
Undetermined cause (known date)
14.62 %
Undetermined tumor (affected organ unknown)
7.69 %
*Respiratory
4.77 %
Domestic accident (crush, door...)
4.63 %
Undetermined infection or abscess
4.22 %
Bronchitis, pneumonia
4.19 %
Stroke
3.21 %
*Other
2.17 %
Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
1.91 %
*Neurological (brain, spinal cords, nerves)
1.53 %
Veterinary accident (anesthesia during a minor operation, medical error, etc.)
1.15 %
Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.08 %
*Infant mortality (up to 6 week old)
0.93 %
Heart failure, valvular disease
0.73 %
Stillborn
0.57 %
Pituitary tumor
0.56 %
Otitis, ear abscess
0.47 %
Complications of gestation or parturition
0.47 %
Mammary tumor
0.45 %
Renal failure
0.28 %
Intestinal obstruction (excluding megacolon)
0.24 %
Facial tumor (excluding Zymbal tumor)
0.23 %
Zymbal gland tumor
0.23 %
Lung tumor
0.21 %
Digestive tumor (stomach, liver, pancreas, intestines...)
0.2 %
Epilepsy
0.2 %
Lack of milk
0.18 %
Food poisoning
0.17 %
Hereditary megacolon
0.17 %
Uterus infection (metritis, pyometra)
0.14 %
Pulmonary edema
0.13 %
Liver failure
0.12 %
Generalized cancer, leukemia, lymphoma
0.12 %
Brain tumor
0.12 %
Other respiratory trouble
0.11 %
Malformation, hydrocephalus
0.11 %
*Urinary system (kidney, bladder)
0.11 %
Heart attack, infarct, pulmonary embolism
0.11 %
Tooth abscess
0.09 %
Heatstroke
0.09 %
Uterine tumor
0.09 %
Other tumor (salivary, spleen, adrenal, thyroid...)
0.09 %
Suffocation, choking
0.09 %
*Skin
0.08 %
Pododermatitis
0.08 %
Dental malocclusion
0.07 %
Other heart or vascular problem
0.06 %
Vaginal prolapse (excluding tumors and postpartum)
0.06 %
Falls, fractures, head or spinal cord trauma (excluding fights)
0.06 %
Facial abscess (excluding teeth and Zymbal gland)
0.06 %
Kidney tumor
0.05 %
Hemorrhage (exaggerated relative to the context, coagulation disorder, hemophilia)
0.05 %
Other digestive trouble
0.04 %
Diabetes
0.04 %
Allergy, anaphylactic shock
0.04 %
Other neurological trouble
0.04 %
*Unknown cause
0.04 %
Urinary or kidney infection
0.04 %
Subcutaneous abscess
0.03 %
Sepsis
0.03 %
Other infant mortality cause
0.03 %
Other known cause fitting no other category
0.03 %
Skin tumor, skin cancer
0.03 %
*Eye, ear, mouth, face
0.03 %
Digestive hemorrhage
0.03 %
Other reproductive system disorder
0.03 %
Bladder tumor
0.02 %
Other accident or trauma
0.02 %
Progressive spinal cord damage, degenerative paralysis
0.02 %
Malnutrition
0.02 %
Other urinary disorder
0.02 %
Euthanasia without medical cause
0.02 %
Urethral obstruction, urinary retention, stones
0.02 %
Digestive abscess
0.02 %
Other head related trouble
0.02 %
*Accidents, traumas, poisonings
0.01 %
Brain infection, encephalitis, meningitis
0.01 %
Muscle tumor
0.01 %
Other musculoskeletal trouble
0.01 %
Extensive skin infection (pyoderma, bedsores, etc.)
0.01 %
Bone tumor
0.01 %
Retro-orbital abscess
0.01 %
Vaginal tumor
0.01 %
Glaucoma
0.01 %
Gastroenteritis, diarrhea
0.01 %
Ovarian tumor
0.01 %
*Cardiovascular
0.01 %
*Digestive
0.01 %
*Reproductive system
0 %
Joint or bone infection, septic arthritis
0 %
Testicular tumor
0 %
Retro-orbital tumor
0 %
Parasites

Most frequent tumours

Number of tumour-related deaths 3,725 rats (17.16 % of rats with known death cause)
By decreasing frequency * please note that tumour localization could not be recorded before 2023
85.18 %
Undetermined tumor (affected organ unknown)
3.33 %
Pituitary tumor
2.77 %
Mammary tumor
1.4 %
Facial tumor (excluding Zymbal tumor)
1.34 %
Zymbal gland tumor
1.32 %
Lung tumor
1.21 %
Digestive tumor (stomach, liver, pancreas, intestines...)
0.72 %
Generalized cancer, leukemia, lymphoma
0.7 %
Brain tumor
0.51 %
Uterine tumor
0.51 %
Other tumor (salivary, spleen, adrenal, thyroid...)
0.32 %
Kidney tumor
0.19 %
Skin tumor, skin cancer
0.16 %
Bladder tumor
0.08 %
Bone tumor
0.08 %
Muscle tumor
0.08 %
Vaginal tumor
0.05 %
Ovarian tumor
0.03 %
Testicular tumor
0.03 %
Retro-orbital tumor
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